--- a/gcc/emit-rtl.h	Thu Oct 25 07:37:49 2018 +0900
+++ b/gcc/emit-rtl.h	Thu Feb 13 11:34:05 2020 +0900
@@ -1,5 +1,5 @@
 /* Exported functions from emit-rtl.c
-   Copyright (C) 2004-2018 Free Software Foundation, Inc.
+   Copyright (C) 2004-2020 Free Software Foundation, Inc.
 
 This file is part of GCC.
 
@@ -20,8 +20,9 @@
 #ifndef GCC_EMIT_RTL_H
 #define GCC_EMIT_RTL_H
 
-struct temp_slot;
-typedef struct temp_slot *temp_slot_p;
+class temp_slot;
+typedef class temp_slot *temp_slot_p;
+class predefined_function_abi;
 
 /* Information mainlined about RTL representation of incoming arguments.  */
 struct GTY(()) incoming_args {
@@ -64,6 +65,14 @@
   struct function_subsections subsections;
   struct rtl_eh eh;
 
+  /* The ABI of the function, i.e. the interface it presents to its callers.
+     This is the ABI that should be queried to see which registers the
+     function needs to save before it uses them.
+
+     Other functions (including those called by this function) might use
+     different ABIs.  */
+  const predefined_function_abi *GTY((skip)) abi;
+
   /* For function.c  */
 
   /* # of bytes of outgoing arguments.  If ACCUMULATE_OUTGOING_ARGS is
@@ -87,6 +96,10 @@
      Used for detecting stack clobbers.  */
   tree stack_protect_guard;
 
+  /* The __stack_chk_guard variable or expression holding the stack
+     protector canary value.  */
+  tree stack_protect_guard_decl;
+
   /* List (chain of INSN_LIST) of labels heading the current handlers for
      nonlocal gotos.  */
   rtx_insn_list *x_nonlocal_goto_handler_labels;
@@ -106,7 +119,7 @@
   vec<rtx, va_gc> *x_stack_slot_list;
 
   /* List of empty areas in the stack frame.  */
-  struct frame_space *frame_space_list;
+  class frame_space *frame_space_list;
 
   /* Place after which to insert the tail_recursion_label if we need one.  */
   rtx_note *x_stack_check_probe_note;
@@ -132,7 +145,7 @@
   vec<temp_slot_p, va_gc> *x_used_temp_slots;
 
   /* List of available temp slots.  */
-  struct temp_slot *x_avail_temp_slots;
+  class temp_slot *x_avail_temp_slots;
 
   /* Current nesting level for temporaries.  */
   int x_temp_slot_level;
@@ -245,7 +258,7 @@
   /* True if dbr_schedule has already been called for this function.  */
   bool dbr_scheduled_p;
 
-  /* True if current function can not throw.  Unlike
+  /* True if current function cannot throw.  Unlike
      TREE_NOTHROW (current_function_decl) it is set even for overwritable
      function where currently compiled version of it is nothrow.  */
   bool nothrow;
@@ -315,7 +328,7 @@
 #define crtl (&x_rtl)
 
 /* Return whether two MEM_ATTRs are equal.  */
-bool mem_attrs_eq_p (const struct mem_attrs *, const struct mem_attrs *);
+bool mem_attrs_eq_p (const class mem_attrs *, const class mem_attrs *);
 
 /* Set the alias set of MEM to SET.  */
 extern void set_mem_alias_set (rtx, alias_set_type);